WO2015160186A2 - Relais mobile, moyens de transport le comprenant, et terminal commandé par un relais mobile - Google Patents

Relais mobile, moyens de transport le comprenant, et terminal commandé par un relais mobile Download PDF

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Publication number
WO2015160186A2
WO2015160186A2 PCT/KR2015/003784 KR2015003784W WO2015160186A2 WO 2015160186 A2 WO2015160186 A2 WO 2015160186A2 KR 2015003784 W KR2015003784 W KR 2015003784W WO 2015160186 A2 WO2015160186 A2 WO 2015160186A2
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WO
WIPO (PCT)
Prior art keywords
terminal
backhaul link
state
transmission mode
mobile relay
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2015/003784
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English (en)
Korean (ko)
Other versions
WO2015160186A3 (fr
Inventor
최수한
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industry Academic Cooperation Foundation of Dankook University
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Industry Academic Cooperation Foundation of Dankook University
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Publication date
Application filed by Industry Academic Cooperation Foundation of Dankook University filed Critical Industry Academic Cooperation Foundation of Dankook University
Priority to US15/304,378 priority Critical patent/US10701617B2/en
Publication of WO2015160186A2 publication Critical patent/WO2015160186A2/fr
Anticipated expiration legal-status Critical
Publication of WO2015160186A3 publication Critical patent/WO2015160186A3/fr
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1614—Details of the supervisory signal using bitmaps
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/385—Transceivers carried on the body, e.g. in helmets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0097—Relays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present invention relates to a wireless communication system, and more particularly, to a mobile device including a mobile relay and a terminal operating as a mobile relay.
  • the mobile relay has no problem in data communication when the backhaul link between the donor base station and the mobile relay providing the backhaul link to the mobile relay is good, but there is a problem in the data communication when the backhaul link is bad.
  • the problem to be solved by the present invention is to provide a mobile relay that can efficiently transmit or receive data in consideration of the state of the backhaul link.
  • Mobile relay is a base station communication unit for transmitting and receiving data through the base station and the backhaul link; A sensing unit configured to sense a state of the backhaul link; A controller which determines a transmission mode and a transmission format of the terminal in consideration of the sensed state of the backhaul link; And a terminal communication unit which transmits the determined transmission mode and transmission format to the terminal.
  • the terminal communication unit transmits the state of the backhaul link to the terminal, and receives channel information of an access link corresponding to the state of the backhaul link from the terminal, and the controller is configured to perform the terminal on the basis of channel information of the access link. It is possible to determine the transmission mode and the transmission format.
  • the terminal communication unit receives the transmission mode of the access link with the terminal while receiving the channel information of the access link, and the control unit, to determine the transmission mode and transmission format of the terminal, the status of the backhaul link, transmission mode, A relational expression or an offset value for a transmission mode and channel information of an access link transmitted by the terminal may be set.
  • the controller may determine the number of terminals that can be connected simultaneously or the terminals that allow simultaneous access based on the state of the backhaul link, the service type of the terminal, or the required quality of service (QoS).
  • QoS quality of service
  • the control unit may increase the number of terminals that can be simultaneously connected as the state of the backhaul link increases, and decrease the number of terminals that can be simultaneously connected as the state of the backhaul link becomes worse.
  • the terminal communication unit may notify a terminal that transmits a random access signal as a bitmap in advance as a bitmap.
  • the controller may instruct some terminals that cannot be processed to communicate in a manner other than the current communication scheme.
  • the mobile relay of the mobile means with a mobile relay includes a base station communication unit for transmitting and receiving data through the base station and the backhaul link; A sensing unit configured to sense a state of the backhaul link; A controller which determines a transmission mode and a transmission format of the terminal in consideration of the sensed state of the backhaul link; And a terminal communication unit which transmits the determined transmission mode and transmission format to the terminal.
  • the terminal communication unit transmits the state of the backhaul link to the terminal, and receives channel information of an access link corresponding to the state of the backhaul link from the terminal, and the controller is configured to perform the terminal on the basis of channel information of the access link. It is possible to determine the transmission mode and the transmission format.
  • the terminal communication unit receives the transmission mode of the access link with the terminal while receiving the channel information of the access link, and the control unit, to determine the transmission mode and transmission format of the terminal, the status of the backhaul link, transmission mode, A relational expression or an offset value for a transmission mode and channel information of an access link transmitted by the terminal may be set.
  • the controller may allow the number of simultaneous accesses or the number of simultaneous accesses based on the state of the backhaul link.
  • the controller may increase the number of accessible terminals according to the type of service requested by the terminal requesting access, and decrease the number of concurrently accessible terminals as the backhaul link is in a bad state.
  • the control unit may increase the number of simultaneous access terminals as the average transmission speed required by the terminal requesting the connection is low, and decrease the number of simultaneous access terminals as the average transmission speed is high.
  • the terminal communication unit may notify in advance as a bitmap to the terminal that allows the transmission of a random access signal.
  • the controller may instruct some terminals that cannot be processed to communicate in a manner other than the current communication scheme.
  • the mobile relay uses a plurality of antennas, and the mobile relay may transmit / receive data through a diversity scheme, beamforming, or multiple input multiple output (MIMO).
  • MIMO multiple input multiple output
  • a terminal operating as a mobile relay includes a base station communication unit for transmitting and receiving data through a base station and a backhaul link; A sensing unit configured to sense a state of the backhaul link; A controller configured to determine a transmission mode and a transmission format of the smart device in consideration of the sensed state of the backhaul link; And a terminal communication unit configured to transmit the determined transmission mode and transmission format to the smart device.
  • the terminal communication unit transmits the state of the backhaul link to the smart device, receives channel information of the access link corresponding to the state of the backhaul link from the smart device, and the control unit transmits channel information or backhaul link of the access link.
  • the transmission mode and the transmission format of the smart device may be determined based on the state of the smart device.
  • the terminal communication unit receives the transmission mode of the access link with the smart device while receiving the channel information of the access link, and the control unit, to determine the transmission mode and transmission format of the smart device, the status of the backhaul link, transmission Mode, a relational expression or an offset value for a transmission mode and a transmission format of an access link transmitted by the smart device may be set.
  • the controller may determine the number of smart devices that can be connected simultaneously or the smart devices that allow simultaneous connection based on the state of the backhaul link.
  • the control unit may increase the number of smart devices that can be simultaneously connected as the state of the backhaul link increases, and decrease the number of smart devices that can be simultaneously connected as the state of the backhaul link becomes worse.
  • the controller may increase the number of smart devices that can be connected simultaneously as the average transmission speed required by the smart devices requesting the connection is low, and decrease the number of smart devices that can be simultaneously connected as the average transmission speed is high.
  • the terminal communication unit may notify a smart device that transmits a random access signal as a bitmap in advance as a bitmap.
  • the controller may instruct some terminals which cannot be processed to communicate in a manner other than the current communication method.
  • the smart device may be a wearable device.
  • the mobile relay according to the embodiment of the present invention can efficiently transmit or receive data in consideration of the state of the backhaul link.
  • the mobile relay may transmit or receive data using a network provided separately.
  • FIG. 1 is a block diagram of a network system according to an embodiment of the present invention.
  • FIG. 2 is a diagram schematically illustrating a case where a mobile relay is located near a base station.
  • FIG. 3 is a diagram schematically illustrating a case where a mobile relay is located at an edge of a cell.
  • FIG. 4 is a block diagram of a mobile relay according to an embodiment of the present invention.
  • FIG. 5 is a diagram illustrating a mobile relay or a terminal using a plurality of networks according to an embodiment of the present invention.
  • FIG. 6 is a diagram illustrating an example of use of a mobile relay according to an embodiment of the present invention.
  • FIG. 7 is a view showing another example of the use of a mobile relay according to an embodiment of the present invention.
  • FIG. 8 is a view showing another example of the use of a mobile relay according to an embodiment of the present invention.
  • FIG. 9 is a flowchart illustrating a method of operating a mobile relay according to an embodiment of the present invention.
  • FIG. 10 is a flowchart illustrating a method of operating a mobile relay according to another embodiment of the present invention.
  • FIG. 11 is a flowchart of a method of operating a mobile relay according to another embodiment of the present invention.
  • FIG. 1 is a block diagram of a network system according to an embodiment of the present invention.
  • the network system includes a mobile relay 100, at least one terminal 200 subscribed to the mobile relay 100, and a base station 300.
  • a mobile relay 100 includes a mobile relay 100, at least one terminal 200 subscribed to the mobile relay 100, and a base station 300.
  • the components shown in FIG. 1 are not essential, so a network system having more or fewer components may be implemented.
  • the mobile relay 100 receives data from each terminal 200 subscribed to the mobile relay 100 and transmits the data to the base station 300.
  • the mobile relay 100 relays data.
  • the mobile relay 100 receives data from the base station 300 and transmits the data to each terminal 200.
  • the mobile relay 100 according to the embodiment of the present invention may also serve as a base station.
  • the mobile relay 100 performs a role of a mobile base station that performs the role of a base station as it is, and in this case, a backhaul link of the mobile relay 100 uses radio resources of the donor base station 300.
  • the mobile relay 100 may operate in conjunction with a moving means, for example, a car or a train.
  • the mobile relay 100 according to an embodiment of the present invention may be movable by the user.
  • the mobile relay 100 according to an embodiment of the present invention may be a terminal.
  • the mobile relay 100 can perform almost the same function as the macro base station.
  • Each terminal 200 transmits data to the mobile relay 100 to which it is subscribed. In addition, each terminal 200 transmits data to the base station 300 through the mobile relay 100 to which it is subscribed. Each terminal 200 according to an embodiment of the present invention receives data from the base station 300 through the mobile relay 100.
  • the link between the terminal 200 and the mobile relay 100 is called an access link.
  • the link between the mobile relay 100 and the base station 300 is called a backhaul link.
  • Each terminal 200 transmits and receives data to and from the mobile relay 100 through an access link.
  • the mobile relay 100 according to the embodiment of the present invention transmits and receives data with the base station 300 through a backhaul link.
  • the base station 300 may be a donor eNodeB.
  • FIG. 2 is a diagram schematically illustrating a case where a mobile relay is located near a base station.
  • the state of the backhaul link is good.
  • the good state of the backhaul link may indicate that the channel state of the backhaul link is good.
  • the state of the backhaul link is not always the best when the mobile relay 100 is located close to the base station 300. Therefore, a good channel state of the backhaul link may mean that the data transmission rate of the backhaul link is high.
  • FIG. 3 is a diagram schematically illustrating a case in which a mobile relay is located at an edge of a cell.
  • the state of the backhaul link may be bad.
  • the bad state of the backhaul link may mean that the channel state and data transmission state of the backhaul link are bad or the transmission rate is low.
  • the state of the backhaul link of the mobile relay 100 may also change according to the position of the mobile relay 100.
  • the mobile relay 100 maintains a relatively close distance from the terminal 200. That is, the distance between the mobile relay 100 and the base station 300 is generally longer than the distance between the mobile relay 100 and the terminal 200.
  • the terminal 200 according to the comparative example transmits channel information such as a channel quality indicator (CQI) to the mobile relay 100 based on the access link between the mobile relays 100.
  • CQI channel quality indicator
  • the terminal 200 according to the comparative example determines the transmission mode and transmission format based on the received channel information.
  • the access link channel information may include channel quality indicator (CQI), rank indicator (RI), and precoding matrix indicator (PMI).
  • CQI channel quality indicator
  • RI rank indicator
  • PMI precoding matrix indicator
  • the terminal 200 when the distance between the terminal 200 and the mobile relay 100 is close, the terminal 200 transmits a high CQI, and when the state of the backhaul link is good, the terminal 200 communicates with the base station 300. There is no big problem.
  • the mobile relay 100 does not consider the state of the backhaul link. Since the transmission mode and the transmission format of the terminal 200 are determined, more data is transmitted than the data capacity that can be processed in the backhaul link may cause a problem.
  • the mobile relay 100 determines the transmission mode and the transmission format of the terminal 200 in consideration of the state of the backhaul link.
  • FIG. 4 is a block diagram of a mobile relay according to an embodiment of the present invention.
  • the mobile relay 100 includes a base station communication unit 130, a terminal communication unit 140, a sensing unit 150, and a controller 160.
  • the components shown in FIG. 4 are not essential, so that the mobile relay 100 with more or less components may be implemented.
  • the base station communication unit 130 transmits and receives data with the base station 300 through a backhaul link.
  • the base station communication unit 130 may transmit and receive data with the base station 300 through one or more networks.
  • the terminal communication unit 140 transmits and receives data with each terminal 200 subscribed to the mobile relay 100 through an access link.
  • the terminal communication unit 140 may transmit backhaul link information to terminals belonging to the mobile relay 100.
  • the backhaul link information may include information about the state of the backhaul link.
  • the terminal communication unit 140 may receive channel information of the access link from each terminal 200.
  • the terminal communication unit 140 may receive information necessary for determining a transmission scheme of the access link while receiving channel information of the access link from each terminal 200.
  • the terminal communication unit 140 may receive channel information including the CQI transmitted from the terminal 200 corresponding to the state of the backhaul link.
  • the sensing unit 150 senses the state of the backhaul link.
  • the controller 160 controls the general operation of the mobile relay 100. In addition, the controller 160 controls the subscription state of the terminal 100 to the mobile relay 100. In addition, the controller 160 may determine whether the terminal 200 subscribes to the mobile relay 100. The controller 160 according to an embodiment of the present invention may determine the transmission mode and transmission format of the terminal 200 in consideration of the state of the backhaul link. The controller 160 according to an embodiment of the present invention may determine the number of terminals 200 or terminals that can be simultaneously connected, in consideration of the state of the backhaul link.
  • the control unit 160 determines the transmission mode and transmission format of the terminal 200 in consideration of the state of the backhaul link, so that even if the state of the backhaul link changes, efficient data transmission management of the access link Is possible.
  • the control unit 160 may determine the transmission mode and transmission format of the terminal 200 based on the channel information of the access link such as the CQI received in response to the state of the backhaul link.
  • the controller 160 determines a transmission mode and a transmission format of the terminal 200 based on the received channel information of the access link.
  • the controller 160 may determine the transmission mode and the transmission format of the terminal 200 based on the received channel information of the access link and the transmission mode of the access link transmitted by the terminal 200.
  • the controller 160 may determine a state of the backhaul link, a transmission mode of the backhaul link, a transmission mode of the access link transmitted by the terminal 200, and channel information of the access link. Set the relation or offset value for the.
  • the controller 160 determines the transmission mode and the transmission format of the terminal 200 accordingly. .
  • controller 160 may instruct the terminal 200 to communicate in a manner other than the current communication scheme in consideration of the state of the backhaul link.
  • the controller 160 may present a portion of the terminals 200 that cannot be processed. It may be instructed to communicate in a manner other than the communication scheme.
  • the controller 160 may determine the number of terminals and the terminal list that can be simultaneously connected to the mobile relay according to the state of the backhaul link based on a predetermined setting value.
  • FIG. 5 is a diagram illustrating a mobile relay or a terminal using a plurality of networks according to an embodiment of the present invention.
  • the mobile relay 100 communicates with a base station 300 through a first network.
  • the controller 160 instructs the terminal 200 to communicate with the base station 300 in a manner other than the current communication method
  • the terminal 200 may communicate with the base station 300 through the second network.
  • the second network may be another communication network such as WiFi in addition to the network with the base station 300.
  • the second network may be LTE or WiFi of the base station 300.
  • the present invention is not limited thereto.
  • FIG. 6 is a diagram illustrating an example of use of a mobile relay according to an embodiment of the present invention.
  • the mobile relay 100 may be attached to a moving means and used.
  • the moving means is described as the bus 110, but the present invention is not limited thereto.
  • the application of the present invention is also possible when other mobile relays 100 are attached to other means of movement.
  • the mobile relay 100 transmits and receives data with each terminal 200 of each passenger of the bus 110.
  • the mobile relay 100 transmits and receives data with the base station 300.
  • the mobile relay 100 When the mobile relay 100 is attached to and used in the moving means, since the plurality of antennas can be installed in the moving means, a plurality of antennas can be used. In addition, when the mobile relay 100 is attached to the mobile means to use a plurality of antennas, it is possible to transmit and receive data through the diversity technique, beamforming, multiple input multiple output (MIMO) technology, etc. This can have a beneficial effect on data transmission. In addition, when the mobile relay 100 is attached to the moving means, the mobile relay 100 may transmit and receive data through a communication device attached to the moving means separately.
  • MIMO multiple input multiple output
  • FIG. 7 is a view showing another example of the use of a mobile relay according to an embodiment of the present invention.
  • the mobile relay 100 may be attached to a moving means and used.
  • the moving means is described as a train 120, but the present invention is not limited thereto.
  • the application of the present invention is also possible when other mobile relays 100 are attached to other means of movement.
  • the mobile relay 100 transmits and receives data with each terminal 200 of each passenger of the train 120.
  • the mobile relay 100 transmits and receives data with the base station 300.
  • a plurality of mobile relays 100 may be disposed in one moving means.
  • the mobile relay 100 since the mobile relay 100 determines the transmission mode and the transmission format of the terminal 200 according to the state of the backhaul link that changes, the mobile relay 100 may be used for a fast changing means such as a train. ) Can be used for efficient data management.
  • FIG. 8 is a view showing another example of the use of a mobile relay according to an embodiment of the present invention.
  • the terminal 100a may operate as the mobile relay described above.
  • other smart devices 200a and 200b may perform the same function instead of the terminal subscribed to the mobile relay described above. Therefore, the description overlapping with the above description will be omitted.
  • the terminal 100a may be a mobile device such as a smart phone, a tablet PC, a notebook PC, and the like.
  • the smart device according to the embodiment of the present invention may be a wearable device such as a smart watch 200a or a smart glass 200b.
  • the smart watch or smart glass transmits and receives data with the terminal 100a serving as a mobile relay, but the present invention is not limited thereto. That is, in the case of a device capable of transmitting and receiving data with the terminal instead of the smart watch 200a or the smart glass 200b, the present invention may be applied.
  • the smart watch 200a or the smart glasses 200b will be described as an example.
  • the terminal 100a operating as a mobile relay transmits and receives data with the smart watch 200a or smart glass 200b subscribed to it.
  • the terminal 100a operating as a mobile relay transmits and receives data with the base station 300.
  • the terminal 100a operating as a mobile relay determines the transmission mode and transmission format of the terminal 200 in consideration of the state of the backhaul link between the base stations 300.
  • a wearable device In general, a wearable device is small in size, and thus, in communication, a large output cannot be generated. Therefore, in communication with the base station 300, when communicating through the terminal (100a), it is possible to generate a larger output than when communicating by itself, which is advantageous in terms of data transmission and reception.
  • FIG. 9 is a flowchart illustrating a method of operating a mobile relay according to an embodiment of the present invention.
  • the sensing unit 150 senses a state of a backhaul link between the mobile relay 100 and the base station 300 (S101).
  • the controller 160 determines the state of the sensed backhaul link (S103). The controller 160 determines whether the backhaul link is good or bad based on the sensed state of the backhaul link.
  • the terminal communication unit 140 transmits backhaul link information to the terminal 200 (S105).
  • the backhaul link information may include information about the state of the backhaul link.
  • the terminal communication unit 140 may receive channel information of the access link transmitted from the terminal 200 in response to the backhaul link information.
  • the terminal 200 may transmit a transmission scheme or a CQI, a transmission format, and the like of an access link based on the state of the backhaul link.
  • the terminal communication unit 140 may receive the channel information of the access link, the CQI and the transmission scheme and transmission format of the access link from the terminal 200.
  • the controller 160 determines a transmission mode and a transmission format of the terminal 200 based on the received channel information of the access link.
  • the controller 160 determines a transmission mode and a transmission format of the terminal 200 in order to determine a transmission mode and a transmission format of the terminal 200, a relational expression regarding a transmission mode and a channel state of an access link transmitted by the terminal 200, or Set Offset value.
  • the terminal communication unit 140 transmits the determined transmission mode and transmission format of the terminal 200 to the terminal 200 (S111).
  • FIG. 10 is a flowchart illustrating a method of operating a mobile relay according to another embodiment of the present invention.
  • the sensing unit 150 senses a state of a backhaul link between the mobile relay 100 and the base station 300 (S201).
  • the controller 160 determines the state of the sensed backhaul link (S203). The controller 160 determines the good or bad backhaul link, the possible transmission mode and the transmission speed of the backhaul link based on the sensed state of the backhaul link.
  • the terminal communication unit 140 receives channel information of the access link from the terminal 200 without separately transmitting information on the backhaul link to the terminal (S205).
  • the terminal 200 may transmit the transmission scheme or transmission format of the access link and the channel information of the access link in consideration of only the state of the access link and not based on the state of the backhaul link.
  • the controller 160 determines a transmission mode and a transmission format of the terminal 200 based on the sensed backhaul link state and the access link channel information received from the terminal (S207).
  • the controller 160 may determine the transmission mode and the transmission format of the terminal 200 based on the channel information, the transmission method, or the transmission format of the access link.
  • the terminal communication unit 140 transmits the determined transmission mode and transmission format of the terminal 200 to the terminal 200 (S209).
  • FIG. 11 is a flowchart of a method of operating a mobile relay according to another embodiment of the present invention.
  • the sensing unit 150 senses a state of a backhaul link between the mobile relay 100 and the base station 300 (S301).
  • the controller 160 determines the state of the sensed backhaul link (S303). The controller 160 determines whether the backhaul link is good or bad and a possible transmission speed based on the sensed state of the backhaul link.
  • the controller 160 determines the number of terminals that can be simultaneously connected or the terminal list based on the determined state of the backhaul link (S305).
  • the control unit 160 may increase the number of terminals that can be simultaneously connected as the state of the backhaul link is good.
  • the control unit 160 may reduce the number of terminals that can be simultaneously connected as the backhaul link is in a bad state.
  • the controller 160 may determine the number of terminals that can be simultaneously connected and the terminal list according to the state of the backhaul link based on a predetermined setting value or a quality of service (QoS) requirement of a service used by each terminal.
  • QoS quality of service
  • the controller 160 allows simultaneous access to only the determined number of terminals 200 or terminals belonging to the terminal list (S307).
  • the terminal communication unit 140 may inform the terminal 200 which belongs to the mobile relay 100 in advance in the form of a bitmap or the like whether the random access signal can be transmitted to the terminal allowing the connection. have.
  • the control unit 160 may determine the terminal 200 that allows the random access signal transmission.
  • the number of terminals allowed to access and the terminal list may be changed in real time according to the state of the backhaul link and the service and the situation of the terminal.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Le relais mobile selon un mode de réalisation de la présente invention comprend : une unité de communication de station de base pour transmettre des données à une station de base et recevoir des données d'une station de base, via une liaison de raccordement ; une unité de détection pour détecter l'état de la liaison de raccordement ; une unité de commande pour déterminer un mode de transmission et un format de transmission d'un terminal au vu de l'état détecté de la liaison de raccordement ; et une unité de communication de terminal pour transmettre le mode de transmission et le format de transmission déterminés, au terminal.
PCT/KR2015/003784 2014-04-15 2015-04-15 Relais mobile, moyens de transport le comprenant, et terminal commandé par un relais mobile Ceased WO2015160186A2 (fr)

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US10701617B2 (en) 2020-06-30
KR101437386B1 (ko) 2014-09-05
US20170048782A1 (en) 2017-02-16

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